Fair Value Measurements (Narrative) (Details) - USD ($) |
3 Months Ended | 6 Months Ended |
|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2020 |
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| Fair Value Measurements [Abstract] | ||
| Transfers between levels | $ 0 | $ 0 |
| X | ||||||||||
- Definition Amount of transfer of financial instrument between levels of the fair value hierarchy. No definition available.
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| X | ||||||||||
- References No definition available.
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